Musnad Ahmad 32:1885

'Affan narrated to us, Hammad narrated to us, he said: Thabit informed us, from Anas, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "I entered Paradise and heard a rustling sound, so I said: 'What is this rustling sound?' It was said: 'It is ar-Rumaysa' bint Milhan.'"